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  1. 11 Jul, 2019 3 commits
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    • Jesse McKenna's avatar
      Update autoninja's psutil from v5.2.2 to v5.6.2 · 3b07526a
      Jesse McKenna authored 
      This incorporates a fix to psutil's calculation of
the number of processors on Windows systems with
more than 64 cores.

Windows systems with more than 64 logical
processors divide the processors into groups, with
most applications using only one group, i.e. a
portion of the actual processing power available.
Prior to v5.4.4, psutil only counted the number of
processors in the first processor group. This
resulted in only partial utilization of high-
processing-power systems.

For example, on the 72-core P920, this change has
the following effect:

Before:
> autoninja -C out\nogoma chrome
"c:\src\depot_tools\ninja.exe" -C out\nogoma base -j 38

After:
> autoninja -C out\nogoma chrome
"c:\src\depot_tools\ninja.exe" -C out\nogoma base -j 74

Using this new version of psutil doubles the
number of processors used for building Chrome on
the P920 (when not using goma).

A similar bug exists in ninja.exe, so using
autoninja will be particularly important after
this fix for users of the P920 and other systems
with >64 cores. More fixes will be needed
elsewhere for similar bugs - see crbug.com/980967
for general progress.

Bug: 980270
Change-Id: I8de61a72cf95acf28ef1bcef1b0057b7b1225832
Reviewed-on: https://chromium-review.googlesource.com/c/chromium/tools/depot_tools/+/1686081
Commit-Queue: Jesse McKenna <jessemckenna@google.com>
Reviewed-by: 's avatarBruce Dawson <brucedawson@chromium.org>
Reviewed-by: 's avatarRobbie Iannucci <iannucci@chromium.org>
      3b07526a
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